Copper-cobalt hexacyanoferrate modified glassy carbon electrode for an indirect electrochemical determination of mercury

被引：18

作者：

Sharma, Vivek Vishal ^{[1
]}

Tonelli, Domenica ^{[1
]}

Guadagnini, Lorella ^{[1
]}

Gazzano, Massimo ^{[1
,2
]}

机构：

[1] Univ Bologna, INSTM, Dept Ind Chem Toso Montanari, UdR Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy

[2] Univ Bologna, ISOF CNR, Dept Chem G Ciamician, Via Selmi 2, I-40126 Bologna, Italy

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2017年 / 238卷

关键词：

Mercury; Hexacyanoferrates; Glassy carbon; L-cysteine; Interfering species; PASTE ELECTRODE; OPTICAL SENSOR; MASKING AGENT; ION; FILMS; HG2+; SPECTROMETRY; BIOSENSORS; SAMPLES; WATER;

D O I：

10.1016/j.snb.2016.07.005

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An electrochemical sensor based on a glassy carbon electrode modified with a hybrid film of copper cobalt hexacyanoferrate was prepared for the indirect electrochemical determination of Hg2+. It exploits the formation of a redox inactive complex with thiols. t-cysteine and 1,4-butanedithiol were used, with the former giving more sensitive results. Interference studies were carried out which led to Cu2+ being the major interferent. Exploiting the fact that the response of t-cysteine to Hg2+ is much more rapid compared to Cu2+, the interference from Cu2+ was avoided or minimized by quick measurement of the amperometric current after the addition of the analyte. The modified electrode showed promising results in detecting Hg2+ in spiked mineral water samples. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：9 / 15

页数：7

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